I got Botox that was weak because it was either expired or diluted. It had basically no effect that I could see (and I've had it before so I know what it does). I called and they said they would touch up for free. When I went in, they were going to charge me more $$ and said it was just fine. Make your own judgement, but they have not impressed or kept me as a client because they do not stand behind their work.